Balance Sheet Components - Standard Product Warranty Liability (Details) $ in Thousands	3 Months Ended
Mar. 31, 2026 USD ($)
Movement in Standard Product Warranty Accrual [Roll Forward]
Balances at December 31, 2025	$ 20,013
Accrued warranty, net and product performance liabilities	26,704
Product performance expenditures during the period	(8,352)
Balances at March 31, 2026	38,365
Warranty reserve	$ 19,700

Standard Product Warranty Accrual And Product Performance Liabilities, Increase (Decrease) For Preexisting Warranties And Decrease For Payments

No definition available.

Name:	be_StandardProductWarrantyAccrualAndProductPerformanceLiabilitiesIncreaseDecreaseForPreexistingWarrantiesAndDecreaseForPayments
Namespace Prefix:	be_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Standard Product Warranty Accrual And Product Performance Liabilities, Increase For Warranties Issued

No definition available.

Name:	be_StandardProductWarrantyAccrualAndProductPerformanceLiabilitiesIncreaseForWarrantiesIssued
Namespace Prefix:	be_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Standard Product Warranty Accrual And Product Performance Liabilities, Net

No definition available.

Name:	be_StandardProductWarrantyAccrualAndProductPerformanceLiabilitiesNet
Namespace Prefix:	be_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Standard Product Warranty Accrual And Product Performance Liabilities, Warranty Reserve

No definition available.

Name:	be_StandardProductWarrantyAccrualAndProductPerformanceLiabilitiesWarrantyReserve
Namespace Prefix:	be_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

Name:	us-gaap_MovementInStandardProductWarrantyAccrualRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration